Reamer



H; L. SQUIRES j REAMER Feb. 6, 1940. I

Filed Dec. 8, 1938 ATTORN s.

Patented Feb, 6, 1940 'REAMER Howard L. Squires, Houston, Tex., assignor to Reed Roller Bit Company, Houston, Tex., a corporation of Texas Application December 8, 1 938, Serial No. 244,536 Claims. (01. 255-73) I This invention relates to reamers for use in drilling wells. It has for its general object the provision of a structure whereby a reamer cutter of the roller type may be firmly and rigidly mounted within a cutter recess in a reamerbody.

In mounting reamer cutters within their recesses, it is desirable that there be no possibility of play between any of the parts constituting the mounting during the operation of the reamer. It is, therefore, an object of this invention to provide a structure for mounting a reamer cutter in a recess in the side of a reamer body in such a manner as to give the greatest, possible degree .of rigidity to the mounting, prevent any play or lost motion between the parts of the mounting during the operation and at the same time utilize the smallest number of 7 parts and eliminate any parts which might be broken ordistorted in use. 1

It is a further object of this invention to provide a structure in which reamer cutters may be most easily and quickly and at the same time most rigidly and securely mounted within their recesses. It is also an object that such mounting will permit easy and quick removal of such reamer cutters when desired.

It is a further object of this invention toprovide a structure which will make it possible to assemble a reamer cutter upon its cutter pin and to provide supporting blocks upon the ends of the cutter pin, after which the assembly so formed may be mounted upon a cutter body and dismounted therefrom as a unit whenever desired and without damage to any of the parts em ployed.

It is .a further object that the act of removal and replacement of these assembly units involve the least possible loss, of time and the least amount of necessary skill and that .it requires no special tools or implements.

.Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawing, it

.being understood that the same are byway of.

illustration and example only. In the, drawing:

Fig, 1 is a side elevation of a reamer body con- ,structed in accordance with this invention showing the reamer cutters inplace therein.

Fig. 2 is a vertical cross section through one wall of thereamerlbody illustrated in Fig. 1 and through one of the cutters mounted therein. I i

Fig. 3 is a horizontal cross section taken along the line 33 of Fig. 1. l i

Fig. 4 is a partial horizontal cross section taken along the lined-4 of Fig. 1. I Fig. 5 is a partial horizontal cross section taken along the line 5-5 of Fig. 1. I

Fig. 6 is a partial horizontal cross section taken along the line 6-6 of Fig. 1.

the narrower part of the slot 16. provided with a set screw l8 extending there- ..welding 23.

Fig. 7 is a partial horizontal cross section taken along the line -'l--'! of Fig. 1.

Fig. .8 is a horizontal cross section taken along the line 3-8 of Fig. 2. A

In accordance with this invention, the reamer body I is formed with a plurality of major recesses 2, each adapted to receive a reamer cutter a. At the opposite ends of each of the major recesses are auxiliary recesses 4 and 5, respectively opening into the ends of the major recesses. The recess 4 is of rectangular cross section hav- ..'i ng,opposite parallel sides and a ring 6 is formed in two parts as shown in Fig. 3 and welded about the reamer body overlying the auxiliary recess 4 as illustrated, the welding connection being shown at 1. This ring is also welded along its edge to the reamer body asshown at 8 and 9, respectvely. At the point where it overlies the recess 4, the ring 6 is beveled along its inner surring .6 within the recess 4 pockets which taper downwardly awayi'rom the major recess. The upper recess 5 is likewise of rectangular cross section. Within the upper end portion of this recess, there is secured by means of welding, or the of welding, suchas shown at I3 and l4, so that it forms a rigidpart of the body of the reamer.

At the lower end of the block [I and in alignment with the notch 12 across the end of this block is a transversely extending tapering slot or groove E6 in the reamer body adapted to receive a wedge shaped key 15. The lower wall of the slot or groove 16, which is farthest from, the block ll' lies in a plane perpendicular to the axis of the reamer body while its upper wall lies in ,a plane inclined with respect to an intersecting plane perpendicular to the axis providing a slot tapering in one direction. Beneath the slot IS, the

I auxiliary recess 5 is formed with an inclined bottom surface, as shown at H inclined to the inner side wall of groove H5 in Fig. 6, the bottom wall of recess 5 being inclined in the direction toward The key I5 is through and adapted to engage the inclined lower backing out. I The cutter 3 hereinbefore referred to, is rotatface, as shown at in, so as to form beneath the surface I! of the recess 5 to prevent the keyfrom 51) ably mounted upon the cutter pin or shaft l9 having a blockilll secured to one end thereof by m.eans-of.welding 2! and a block 22 secured.

to the other end thereof by means of similar ring 6 and be wedged between that ring'and the bottom of the recess 4 and the block 22 is adapt- The block 20 has a tapered tongue 1 like part 2 t adapted to fit beneath the welded ed to fit within the recess 5 below the groove I6 I and has a notch or groove transversely thereof adapted to be in alignment with the groove and toreceive a part of the key [5. i

From the foregoing it will be seen that all that is necessary to remove the cutter assembly illusp trated from the reamer body is to loosen the set screw l8, drive the key l5 out of the slot I6 and screw I 8 then tightened to prevent the key I 5 from backing out.

It will be seen from the foregoing that a means has been provided whereby a cutter assemblyv may beeasily and quickly removed from a reamer body and replaced as a unit and without necessity for disturbing the rotatable mounting of the cutter. At the same time, a means has been provided for firmly and securely mounting such cutter assembly with respect to the body and for preventing any possible dislocation thereof during the reaming operation. A minimum. number of movable parts is employed and the simplest construction is used. No skill is required in removing or replacing the cutters and no adjustments are necessary. A means has thus been provided for carrying out all of the objects and advantages sought by this invention.

Having described my invention, I claim:

1. In a reamer, a reamer body having a major recess in one side thereof and an auxiliary recess at each end of said major recess, one of said auxiliary recesses being in the form of a tapered socket opening toward said major recess and the other of said auxiliary recesses being open radially outwardly and longitudinally toward said major recess and having an abutment at its end remote from said major recess,

a cutter assembly comprising a pair of blocks and a cutter rotatably mounted therebetween, one of; said blocks being tapered to wedgingly engage said tapered socket when said assembly is the other of i said auxiliary recesses being open radially outwardly and longitudinally toward said major recess, a cutter assembly comprising a pair of blocks and a cutter rotatably mounted between them, one of said blocks being tapered to wedgingly engage said tapered socket when said assembly is moved lengthwise of said body toward said socket and the other of said blocks adapted to be positioned in the other of said auxiliary recesses, and a key passing through a portion of said body and engaging said last mentioned block to prevent said block from moving radially from its auxiliary recess and for urging it in a direction to force said first block into said tapered socket.

recess in one side thereof and an auxiliary recess at each end of said major recess, one of said .auxiliary recesses being inrthe form of a tapered socket opening toward said major recess, the other of said auxiliary recesses being open radially outwardly and longitudinally toward said major recess, a cutter assembly comprising a pair of blocks and a cutter rotatably mounted between them, one of said blocks being tapered to wedgingly engage said tapered socket when said assembly is moved lengthwise of said body toward said socket and the other of said blocks adapted to be positioned in the other of said auxiliary recesses and a tapered key passing through a portion of said body and engaging said'. last mentioned block to prevent said block from moving radially from its auxiliary recess and for urging it in a direction-to force said into said tapered socket.

4. In a reamer, a reamer body having a major recess in one side thereof and an auxiliary recess at each end of said major recess, one of said major recess and having an abutment at 1 its end remote from said major recess, a cutter assembly comprising a pair of blocks and the cutter rotatablymounted between them, one of said blocks being tapered to wedgingly engage saidtapered socket when said assembly is moved lengthwise of said body toward saidsocket and the other of said blocks being adapted to be positioned in the other of said auxiliary recesses adjacent said abutment, said last mentioned block and the adjacent portion of said body I having registering key ways formed therein, and

a keypassing through a portion of said body and engaging the key ways in said last men,- tioned block and said body toprevent said block from moving radially from its auxiliary recess and for urging it in a direction to force said first block into said tapered socket.

5. In a reamer, a' reamer body having a major recess in one side thereof and an auxiliary recess in each end of said major recess, one of said auxiliary recesses being in the form of a tapered.

socket opening toward said major recess, the

other of said auxiliary recesses being open radially outwardly and longitudinally toward said major recess and havingan abutment at its end remote from said major recess, a cutter assembly comprising a pair of blocks and a cutter ro tatab-ly mounted between them, one, of said blocks being tapered "to wedgingly engage said tapered socket when said assembly is moved lengthwise of said body toward said socket and the other of said blocks being adapted to be adjacent said abutment, said last mentioned block and adjacent portions of said body and all of said key ways for preventingsaid blocks first block into said tapered. socket.

HOWARD L. sQuIREs.

-60 positioned in the other of said auxiliary recesses from moving radially from its auxiliary recess and for urging it in a direction to force said 

